1 Victor Horta: top floor, Tassel house, Ixelles, Brussels, 1893. Horta’s first design in an entirely new style. A glazed roof with slender iron supports provides brightly lit interiors. Instead of the usual Belgian corridors, Horta uses a central hall and staircase, heralding the modern movement’s use of flowing spaces and ‘plan of volumes’. Horta’s whiplash line flies freely through the ironwork and over the walls, floor and ceiling.